AERATION DUCT DESIGN MODEL FOR FLAT GRAIN STORAGE.

For grain stored in piles and rectangular structures, aeration is generally conducted using above floor or flush mounted duct systems. The design of these systems is dependent on several factors including the configuration of the grain mass, the design airflow rate and grain volume and duct spacing criteria that will provide a relatively uniform distribution of air throughout the grain mass. The objective of this paper is to present a computer model that will determine duct sizes and duct spacing for aeration of rectangular storages based on system design requirements specified by the user. The model is developed for use on the personal computer and should provide a useful design tool for extension engineers.